<div class="page-container" v-cloak>
    <el-card>
        <template #header>
            <div class="breadcrumb">
                <el-breadcrumb separator="/">
                    <el-breadcrumb-item>demo</el-breadcrumb-item>
                </el-breadcrumb>
            </div>
        </template>
        <div>
            hello child
        </div>
    </el-card>
</div>

<script>
    const App = {}
</script>